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  1. stevieblunder

    signed number etiquette

    Sounds like you are tring to do some kind of floating point accumulator. I would just make it fixed, N bits bigger than the input there 2^N is the max number of samples you plan to integrate. If you need a floating point output, count the leading zeros to get the exponent, and left shift <<...
  2. stevieblunder

    4-bit comparator and master slave flip flop

    The idea of a &quot;high-level&quot; language like VHDL is that you don't worry much about flip-flops. You let the compiler worry about that. If you define two integer signals range (0-15) and compare them &quot;out <= A < B;&quot;, &quot;out&quot; will probably compile to a 4 bit comparator.
  3. stevieblunder

    shared variable-memory modeling

    How about a time division mux schedule, at least for writing to RAM. Steve
  4. stevieblunder

    VHDL LCD programming on xilinx processor

    A bit short of details so I will make a lot of assumptions: Assuming you want to make an asci display on a dot matrix display: You need a display memory organised, say 80 by 24 bytes. You need horizontal and vertical counters, the vertical counts the carry from horizontal. You need a character...
  5. stevieblunder

    Flip Flop Syncing

    A flip flop is implied when stuff is defined under a rising edge clock event. I think the &quot;sync&quot; circuit you are thinking of is just two cascaded D Flip-flops. In VHDL thats just: asign under a clock event: temp <= input; out <= temp; where temp and out are the outputs from the two...
  6. stevieblunder

    Is overclocking really mean equal too?

    Overclocking is a bit like turbocharging a motor. The problem is that it can easily overheat and burn out, although it will most likely start to make digital mistakes and crash before the CPU becomes toast. The biggest problem is the little errors that are not obvious until you discover them...
  7. stevieblunder

    CD-Rom drive not being detected, please help.

    As I said in the previous thread, don't bother with windows until your BIOS reads and identifies all your IDE drives. You are just wasting time pissing around in windows. The problem is very likely a physical problem with the cable and connectors. Be sure they are not inverted. There is a tiny...
  8. stevieblunder

    Install can't find hard drive

    Ahh guys, You do know that W98 does not support NTFS and NT-4 does not support FAT32 ? Only a FAT16 HDD format will work for iether, and that will be limited to, hmm, I think it was 2G. One great feature of old NT-4 was that the basic I86 OS image depended on the BIOS for I/O, sooo, a basic...
  9. stevieblunder

    Need help installing SBC Yahoo DSL

    DSL uses the same phone wire to carry frequencies above the audio range. The DSL modem can handle some &quot;stub&quot; interference, but it will work best if there are no branches in your phone line before the DSL modem. All phones must be behind a filter so that they do not load the DSL...
  10. stevieblunder

    Good inexpensive digital cameras?

    You want at least 2Mpix, some optical zoom, and as consumer reports saz, using AA batteries is a big bonus. At the moment, rechargeable NiMH AA batteries are a much better deal than the alternatives. There are plenty of subtle issues that you will not discover easily. My daughter has a cheap 2M...
  11. stevieblunder

    Recommend a printer

    If your money is scarce, you want to learn how to refill ink cartridges. The first time I tried this, it was a messy disaster. I didn't understand the importance of air pressure in the cartridge. Seal the bottom with scotch tape while you drill a fill hole in the top and when you are filling...
  12. stevieblunder

    problem adding second hard drive

    If the bios is happy with; finds the two drives, then the cables and jumpers are OK. If the BIOS finds a drive but it will not boot, the drive probably has been corrupted or erased, but check for 15/16 sector jumpers that would reorganise the drive sectors, making it &quot;corrupt&quot;.
  13. stevieblunder

    How to decode BIOS errors

    The Bus-Device-Function refers to the PCI bus. Bus 01 (vs Bus 00) means it's probably some card plugged into a PCI slot. &quot;PCI sniffer&quot; may help. The bios may be confused by old PnP data that is not valid, ie a card has been removed. There is probably a BIOS option to allow this...
  14. stevieblunder

    UNIX to PC communication

    As usual, not enough info, but: With a network connection, you can ftp and telnet to the unix system from any PC, and from Unix to the PC if the PC runs ftp and telnet servers in the background. Where I worked until recently, IT had software running, I think on Unix, that emulated, a windows...
  15. stevieblunder

    Would you believe? - Video Out Problems Ahead!

    I found: http://www.sparkysworld.co.uk/connectors.htm It seems SCART connectors have separate in and out. If you do not have both in and out RCA or S-vid on the other end, the cable is probably a SCART out to s-vid in. I assume you want S-vid out from the PC to SCART in. They show an adapter...
  16. stevieblunder

    PCMIA Card Reader Mirrors C Drive

    Both add-in PCMCIA slots, and Win98 are an issue. Machines that do not support PCMCIA at the BIOS, ie not part of the motherboard (desktop PC, not a notebook), are prone to strange problems. Typically there are IRQ problems. You could try moving the PCMCIA adapter to a different PCI slot...
  17. stevieblunder

    Data loss on RJ11 using DSL modems

    Depending how the building is wired, the problem is probably signal distortion due to reflections. High speed signals do not like a bus architecture, nor tree wiring. I wired my phone line directly to the DSL modem only, through a filter, then to all the phones in the house. This puts all the...
  18. stevieblunder

    printing

    Just a stab in the dark: Is it going to your LPT1: port when you want it going to a network printer??? Check the printer settings. cheers, Steve
  19. stevieblunder

    CL2 and CL3 memory

    It never hurts to run DRAM a bit slower, ie use CL2 at CL3. Also note that the bus frequency is part of the equation, ie speed= frequency/latency, so PC2100-CL2 is the same speed as PC3200-CL3, but PC2100 chips may not work with a 200MHz(x2) clock. It's almost certain safe to run PC3200-CL3...
  20. stevieblunder

    PCMCIA cards listed twice in device manager

    I'll guess that the root of the problem is two copies of the PCMCIA bridge chip driver installed. Some are dual chips, but you may have the same driver installed twice for the same bridge. IO devices can also mirror at two or more addresses. I you view Device manager: Computer: properties: view...

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